AirHint found the following cheapest return flights from Washington (DCA) to St. Thomas (STT) in December 2025 (see full year).
Return flights
| 18 Dec - 23 Dec | United | ||
| 06 Dec - 08 Dec | United | ||
| 02 Dec - 05 Dec | Delta | ||
| 01 Dec - 08 Dec | Delta | ||
| 24 Dec - 31 Dec | Delta | ||
| 31 Dec - 04 Jan | Delta | ||
| 21 Dec - 30 Dec | Delta | ||
| 01 Dec - 07 Dec | Delta |
Also check the deals for one-way flights from Washington to St. Thomas in December.
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